Sylius\Behat\Page\Shop\Product\ShowPageInterface::isOutOfStock PHP Method

    public function isOutOfStock();

 /**
  * @Then I should see that it is out of stock
  */
 public function iShouldSeeItIsOutOfStock()
 {
     Assert::true($this->showPage->isOutOfStock(), 'Out of stock label should be visible.');
 }